GB/T 20056-2015 PDF English
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| GB/T 20056-2015 | English | 90 |
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Rolling bearings -- Radial needle roller and cage assemblies -- Boundary dimensions and tolerances
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| GB/T 20056-2006 | English | 319 |
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Rolling bearings -- Radial needle roller and cage assemblies -- Dimensions and tolerances
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GB/T 20056-2015: Rolling bearings -- Radial needle roller and cage assemblies -- Boundary dimensions and tolerances
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT20056-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 21.100.20
J 11
GB/T 20056-2015 / ISO 3030.2011
Replacing GB/T 20056-2006
Rolling bearings - Radial needle roller and cage
assemblies - Boundary dimensions and tolerances
(ISO 3030.2011, IDT)
Issued on: DECEMBER 31, 2015
Implemented on: APRIL 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Symbols... 5
5 Boundary dimensions ... 6
6 Tolerances ... 8
7 Functional gauging and gauge dimensions ... 9
Annex A (Informative) Tolerances for shaft raceway, housing raceway and
raceway widths ... 10
Bibliography ... 13
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 20056-2006 “Rolling bearings - Radial needle
roller and cage assemblies - Dimensions and tolerances”. Compared with GB/T
20056-2006, in addition to editorial modifications, the main technical changes
are as follows.
- modified the standard name;
- added the symbol of a single width deviation of cage and modified its
lower limit deviation value (see Clause 4 and Table 3 of this Edition, 5.2 of
Edition 2006);
- modified the annex “Tolerances for shaft raceway, housing raceway and
raceway widths” (see Annex A of this Edition, Annex A of Edition 2006).
This Standard uses translation method and identically adopts ISO 3030.2011
“Rolling bearings - Radial needle roller and cage assemblies - Boundary
dimensions and tolerances”.
The Chinese documents which have consistency with the international
normative references in this Standard are as follows.
- GB/T 307.2-2005 Rolling bearings - Measuring and gauging principles
and methods (ISO 1132-2.2001, MOD)
- GB/T 309-2000 Rolling bearings - Needle rollers (neq ISO 3096.1996)
- GB/T 4199-2003 Rolling bearings - Tolerances - Definitions (ISO 1132-
1.2000, MOD)
- GB/T 6930-2002 Rolling bearings--Vocabulary (ISO 5593.1997, IDT)
- GB/T 7811-2015 Rolling bearings - Symbols for physical quantities (ISO
15241.2012, IDT)
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee
on Rolling Bearings of Standardization Administration of China (SAC/TC 98).
The drafting organizations of this Standard. Luoyang Bearing Research
Institute Co., Ltd., Suzhou Bearing Factory Co., Ltd., Changzhou Koyo Bearing
Co., Ltd., Jining Jingyi Bearing Co., Ltd., Qidong Jinqiao Bearing Co., Ltd.
Main drafters of this Standard. Song Yucong, Zhang Wenhua, Qian Aifang,
Tang Weiqing, Fu Jilong, Liu Guoqiang.
Version of standard substituted by this Standard is.
- GB/T 20056-2006.
Rolling bearings - Radial needle roller and cage
assemblies - Boundary dimensions and tolerances
1 Scope
This Standard specifies the boundary dimensions for radial needle roller and
cage assemblies.
In addition, it gives the tolerances for the cage width and method of functional
gauging of smallest single bore diameter of needle roller complement.
Informative values for the tolerances of shaft raceway, housing raceway and
raceway widths are given in Annex A.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
ISO 1132-1, Rolling bearings - Tolerances - Part 1. Terms and definitions
ISO 1132-2.2001, Rolling bearings - Tolerances - Part 2. Measuring and
gauging principles and methods
ISO 3096, Rolling bearings - Needle rollers - Dimensions and tolerances
ISO 5593, Rolling bearings - Vocabulary
ISO 15241, Rolling bearings - Symbols for quantities
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1132-
1 and ISO 5593 apply.
4 Symbols
For the purposes of this document, the symbols given in ISO 15241 and the
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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